Joist Deck
- Provides educational information about steel joists, joist girders, and steel deck.
- http://www.joistdeck.com/

Nucor Vulcraft St Joe Division
- Manufacturer of steel joists and joist girders serving Illinois, Indiana, Michigan, and Ohio.
- http://www.vulcraft-in.com/

Block Joist System
- Offers a structural system with concrete blocks placed side-by-side between open web steel joists resulting in concrete floors and roofs.
- http://www.blockjoist.com/

Advanced Floor Concepts
- Colorado based company offers light gage steel joist with wood deck structural floor system.
- http://www.steelfloors.com/

Hopleys Open Web Steel Joists
- Made from lightweight, high grade steel and are galvanized for corrosion protection. Ideal for floors and roofs in domestic, commercial and industrial applications. Provided by Hunt Engineering, Inc. in Australia.
- http://www.hopleys.com.au/

Canam Asia
- Designer and manufacturer of steel joists and floor systems with the facility located in Dammam, Saudi Arabia.
- http://www.canamasia.com/

Dietrich Steel Joists
- Manufacturer of light gage steel joists for commercial and residential construction.
- http://www.dietrichsteeljoist.com/

Delta Joists
- Designs and fabricates steel joists used in commercial and industrial buildings. Serves Eastern Canada and the New England States.
- http://www.deltajoists.com/

The New Columbia Joist Company
- Offers a full line of Steel Joist Institute approved steel joists and joist girders.
- http://www.njb-united.com/ncj.htm

Vulcraft
- Nucor Vulcraft Group engineers and fabricates K-series, KCS-series, LH-series, DLH-series and SLH-series joists as well as joist girders, including special profiles such as single and double pitched, bowstring, arched chords, and scissor.
- http://www.vulcraft.com/

New Millennium Building Systems, LLC
- Manufactures joist products, including bowstring, arched, scissor, double-pitched, and single-pitched joists.
- http://www.joist-deck.com

SMI Joist Company
- Designs and fabricates steel joists and joist girders with plants located in Arkansas, Florida, Iowa, Nevada and South Carolina.
- http://www.smijoist.com

Canam Steel
- Designs and manufactures steel joists and steel components, mainly for the construction market of North America. Plant locations, publications, services, and products are featured.
- http://www.canamsteel.com/

MBS Steel Ltd.
- Manufactures open web steel joists and trusses for use in industrial, institutional and commercial buildings. Based in Brampton, Ontario, Canada.
- http://www.mbssteel.com/

Steel Joist Institute (SJI)
- A not-for-profit organization that sets standards for the steel joist industry and helps building code bodies to develop code resolutions regarding steel joists and joist girders.
- http://www.steeljoist.org/

John W. Hancock, Jr., Inc.
- Manufacturer of steel joists. Offers typical joist and girder sections and details and a glossary of joist and structural steel terms.
- http://www.hancockjoist.com/

Omega Joists Inc.
- Manufactures open web steel joists from high strength cold formed chord sections and hollow structural web members. Specification tables for chord properties, moment of resistance and inertia.
- http://www.omegajoists.com/

Valley Joist, Inc
- Manufacturer of joists and metal decks. Includes a listing of regional sales representatives.
- http://www.valleyjoist.com/

Structures of U.S.A., Inc.
- Manufactures steel bar joists and mezzanines. Supplies steel deck, structural steel, and accessories. Provides CADD and engineering services.
- http://www.structuresofusa.com/